catena-Poly[bis(1,3-benzothiazol-3-ium) [[dichloridoantimonate(III)]-di-μ-chlorido-μ-oxido-[chloridoantimonate(III)]-μ-chlorido]]

Abstract

The title compound, {(C7H6NS)2[Sb2Cl6O]}n, contains two benzothiazolidium cations and one tri-μ-chlorido-trichlorido-μ-oxido-diantimonate(III) anion. The structure of the inorganic cation may be described as as being built up from two polyhedra,i.e.a square-pyramidal SbCl4O and a distorted octahedral SbOCl5unit, sharing a common face (comprising the O atom and two Cl atoms). The two benzothiazole cations are quasi-planar and subtend a dihedral angle of 19.93 (5)°. The crystal packing can be described by alternating (100) layers and [001] chains of the organic cations and inorganic anions connected through an extensive three-dimensional network of N—H...Cl, C—H...O and C—H...Cl hydrogen bonds. This is consolidated by slipped π–π stacking, with centroid-to-centroid distances between the benzothiazole rings of 3.7111 (18)–3.8452 (16) Å. These interactions link the molecules within the layers and also link the layers together and reinforce the cohesion of the ionic structure.